<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <counter></counter>
        <hr>
        <counter></counter>
        <hr>
        <counter></counter>
    </div>

    <template id="tmpl">
        <div>
            <input type="button" value="+1" @click="increment">
            <h3>{{count}}</h3>
        </div>
    </template>
    <script>

        var dataObj = {count:0};

        Vue.component('counter',{
            template: '#tmpl',
            data: function(){
                //return dataObj;
                return {count: 0}
            },
            methods:{
                increment(){
                    this.count++;
                }
            }
        });

        var vm = new Vue({
            el: '#app',
            data: {

            }
        });
        
    </script>
</body>
</html>